l enfant



No. 619,962; Patented Feb. 2|, I899.

' c. LENFANT.

DIE FOB CUTTING BOOK COVER BLANKS.

(Application filed Sept. 14, 1898.) (No Mude| 2 Sheets-Sheet l.

(i) I g;

W/T/VESSES: llVVE/VTOI? No. 619,967 Patented Feb. 2!,1899. c. LENFANT.

DIE FDR CUTTING BOOK COVER BLANKS.

(Application filed Sept. 14, 1898.) (No Model.) 2 Sheets-Sheet 2.

WITNESSES: l/Vl/EA/TOI? UNITED STATES PATENT OFFIC CHARLES LENFANT, OFNEW YORK, N. Y.

DIE FOR CUTTING BOOK-COVER BLANKS.

SPECIFICATION forming part of Letters Patent No. 619,967, dated February21, 1899.

Application filed ge tember 14, 1898. Serial No. 690,916. (No model.)

To all whom, it nuzy concern:

Be it known that I, CHARLES LENFANT, a citizen of the United States,residing in the city of New York, borough of Manhattan, and State of NewYork, have invented certain new and useful Improvements in Dies forCutting Blanks for Flexible Book-Covers, of which the following is aspecification.

This invention relates to an improved. die for cutting, by one operationand without the use of skilled labor, the blanks for flexiblebook-covers,for which Patent No. 553,530 was granted to me January 28,1898, said die being so constructed that the blank is not only cut intothe proper shape, but also creased at the same time, so as to facilitatethe folding over of the edges of the blank without a special pattern andthe finishing of the flexible book-cover with rounded-off corners andoverlapping edges without requiring skilled hands for this purpose.

The invention consists of a die for cutting the blanks for flexiblebook-covers, said die consisting of a die-plate, a creasing-frameattached to the under side of said die-plate, said creasing-frame beingprovided with rectangular extensions at the corners,and curvedcutting-knives applied to the die-plate at both sides of the corners ofthe creasing-frame, so as to cut the curved slits in the blank.

The invention consists, further, of a blank for flexible book-covers,provided with creases at some distance from the edge, said creasinglinesextending beyond their intersections and curved slits cut into saidblank near the intersections of the creasing-lines, as will be fullydescribed hereinafter and finally pointed out in the claims.

In the accompanying drawings, Figure 1 represents aside elevation of myimproved die for making the blanks for flexible book-covers. Fig. 2 is abottom view of the same. Fig. 3 is a top View of the blank made by myimproved die. Figs. l and 5 are respectively a side elevation and bottomview of one corner of my improved die, drawn on a larger scale; and Fig.6 is a top view of the corner of my improved blank after the same hasbeen acted on by the die.

Similar letters of reference indicate corresponding parts.

patent heretofore referred to.

Referring to the drawings, A represents the die for making blanks forflexible book-covers of the construction shown in my prior The dieconsists of a die-plate A, which is applied to a power-press of anyapproved construction in the usual manner. To the under side of thedie-plate A is applied a creasing-frame B, Which is provided withrectangular creasingribs B, that are arranged in oblong shape in such amanner thatthey intersect at the corners, said ribs at 1) extendingslightly beyond the corners, for a purpose to be hereinafter mentioned.The extensions of said ribs 12 are useful for the purpose of makingcreases for guiding the Worker while paring ofi the corners of theblank, which creases form guides for the eye, because the worker willsee that in paring the lengths of said extensions are the same. Further,they bring the points of meeting of the creases formed by the ribs 1)out more prominently, so that the worker will not pare into the corners.The creasingframe is preferably made of brass or other suitable materialand secured by means of screws 0 to the under side of the die-plate.

At the corners of the creasing-frame B are arranged the steel plates D,which are by screws 0 secured to the corners of the dieplate A and areprovided with openings (1 near the extensions of the creasing-frame Band with curved and sharpened cuttingknives d, that are arranged closeto and at both sides of the intersections of the creasing-frame, asshown clearly in Figs. 2 and 5, said curved cutting-knives cutting theslits in the blanks, as shown in Fig. 6. The cutting-knives are arrangedsymmetrically to the extensions of the creasing-frame, so as to producesymmetrical slits.

The reason of makingv the openings dlarger than the corner extensions ofthe creasing frame B is to permit of the accurate placing of the steelplates D in position, because if the corner extensions of thecreasing-frame were of diiferent sizes or if there were irregularitiesin the same the accurate application of the corner-pieces, and hence theproper position of the cutting-knives d, could not be produced.

The blank E,of leather or other material for the cover, is cut to therequired size and is then placed in the press and exposed to the actionof the die. The lowering of the die produces simultaneously the creasingof the blank at e by the creasing-frame and the cutting of the slits eby the curved cuttingknives, whereby the blank is finished by oneoperation. This blank is then trimmed and pared at the corners, which isfacilitated by the creasing-lines, and the rounded-off corner is finallyproduced according to my patent referred to.

The dotted line shown in Fig. 6 indicates the point at which the paringoif of the cor- 11ers ends.

Each size of book-cover requires a die of corresponding size. The use ofthe dies permits the rapid and absolutely uniform production of theblanks for my improved flexible book-covers, so that the manufacture ofthe same is considerably facilitated and cheapened.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent 1. A die for makingblanks for flexible bookeovers, consisting of a die-plate, acreasingframe on said die-plate, said creasing-frame being made ofoblong shape and provided with extensions at its corners, and curvedcutting-knives arranged near the corners of the creasing-frame andoutside of the same, substantially as set forth.

2. A blank for flexible book-covers, provided withrectangularly-intersecting creases at some distance from the edges andwith curved slits near the corners and outside of said creases,substantially as set forth.

In testimony that I claim the foregoing as myinvention I have signed myname in presence of two subscribing witnesses.

CHARLES LEN FANT.

Witnesses:

PAUL GoEPEL, GEO. L. WHnELooK, Jr.

